📄 jahiaerrordisplay.java
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// $Id: JahiaErrorDisplay.java,v 1.5 2002/11/22 18:34:13 shuber Exp $//// ____.// __/\ ______| |__/\. _______// __ .____| | \ | +----+ \// _______| /--| | | - \ _ | : - \_________// \\______: :---| : : | : | \________>// |__\---\_____________:______: :____|____:_____\// /_____|//// . . . i n j a h i a w e t r u s t . . .////package org.jahia.bin;/** * Title: Jahia * desc: Portal & Publishing server project by Jahia * Copyright: Copyright (c) 2002 * Company: Jahia Ltd * @author Serge Huber * @version 1.0 */import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import java.net.InetAddress;import java.util.Properties;import java.util.Date;import java.util.Enumeration;import javax.mail.*;import javax.mail.internet.*;import org.jahia.settings.*;import org.jahia.exceptions.*;import java.lang.reflect.*;import org.jahia.utils.JahiaConsole;/** * This class is in charge of generating output to the client of error messages. * It is kept simple because it's aim is to be quite solid, and this is easier to * achieve by keeping it minimal. It includes a hardcoded HTML display method in * the case where a dispatching ressource is not available (such as an error in * the configuration of Jahia). * * When throwing a JahiaException, if its "userErrorMsg" message starts with an integer, * ie. "404 Page not found" then this class forwards the error to the "404.jsp" page * if found in the errors directory. For details about those error codes, * see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10">RFC 2616</a> */public class JahiaErrorDisplay { private static final String DISPATCH_DESTINATION = "/jsp/jahia/errors/error.jsp"; private static final String DISPATCH_DIRECTORY = "/jsp/jahia/errors/"; private static final String DISPATCH_PREFIX="error_"; private static final boolean IS_STACK_INCLUDED = true; static { JahiaConsole.println("JahiaErrorDisplay.staticConstructor", "Initialized with destination = [" + DISPATCH_DESTINATION + "]"); } public JahiaErrorDisplay() { } /** * This is a fallback method that is called in the case where the dispatching * to a ressource is not possible. It is hardcoded in order to be as failproof * as possible. */ public static boolean HTMLFallBackDisplay(HttpServletRequest request, HttpServletResponse response, Throwable t) { PrintWriter out = null; try { out = response.getWriter(); } catch (Throwable newt) { return false; } if (out != null) { /** @todo : fixme : this is not update to date with the lastest * chaining stuff */ out.println("<html>"); out.println(" <head>"); out.println(" <title>Jahia Error</title>"); out.println(" </head>"); out.println(" <body>"); out.println(" <table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">"); out.println(" <tr>"); out.println(" <td colspan=\"2\"><h1>Jahia Error</h1></td>"); out.println(" </tr>"); out.println(" <tr>"); out.println(" <td colspan=\"2\">An error has occured while Jahia was processing data. Consult the info below for more precise information</td>"); out.println(" </tr>"); out.println(" <tr>"); out.println(" <td>Exception :</td>"); out.println(" <td>" + t.getMessage() + "</td>"); out.println(" </tr>"); if (IS_STACK_INCLUDED) { out.println(" <tr>"); out.println(" <td>Stack trace : </td>"); out.println(" <td><pre>"); String stackTraceStr = stackTraceToString(t); out.println(stackTraceStr); out.println(" </pre></td>"); out.println(" </tr>"); } out.println(" </table>"); out.println(" </body>"); out.println("</html>"); } else { ; } return false; } public static boolean DisplayException(HttpServletRequest request, HttpServletResponse response, ServletContext context, Throwable t) { return DisplayException(request, response, context, null, t); } /** * Displays an exception on a HTML browser using either JSP pages or * static hardcoded HTML output. Also sends out an email to the administrator * is this feature was activated. * */ public static boolean DisplayException(HttpServletRequest request, HttpServletResponse response, ServletContext context, JahiaPrivateSettings jSettings, Throwable t) { try { if ((request == null) || (response == null) || (context == null) || (t == null)) { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "Can't display exception, not enough information available..."); return false; } // let's log the exception in Tomcat's log system. context.log(throwableToString(t, request, response)); if (response.isCommitted()) { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "Response already committed, aborting client display, exception has been logged..."); return false; } if (t instanceof JahiaException) { JahiaException je = (JahiaException) t; JahiaConsole.println("JahiaErrorDisplay.DisplayException", "ERROR : " + je.getUserErrorMsg() + ", " + je.getJahiaErrorMsg()); JahiaConsole.printe("JahiaErrorDisplay.DisplayException", t); } else { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "ERROR : "+t.getMessage()); JahiaConsole.printe("JahiaErrorDisplay.DisplayException", t); } // By default, uses the standard error message String fullPathToDestination = context.getRealPath(DISPATCH_DESTINATION); String contextPathToDestination = DISPATCH_DESTINATION; File jspFile = new File(fullPathToDestination); File jspFileErrorCode = null; // check if error contains a standard HTTP/1.1 error code, if so, tries to forward to // the corresponding JSP String errorstring = ""; try { errorstring = t.getMessage().trim(); } catch (Throwable tho) {} int errorint = 0; try { if (errorstring.indexOf(" ")!=-1) { errorstring = errorstring.substring (0, errorstring.indexOf(" ")); } } catch (IndexOutOfBoundsException ioobe) {} try { errorint = Integer.parseInt(errorstring); } catch (NumberFormatException nfe) {} catch (Throwable th) {} // yes the error string contains an error code! let's specify the special jsp! if (errorint!=0) { response.setStatus(errorint); // sets response status fullPathToDestination = context.getRealPath (DISPATCH_DIRECTORY + DISPATCH_PREFIX + errorint + ".jsp"); jspFileErrorCode = new File(fullPathToDestination); if (jspFileErrorCode.exists()) { jspFile = jspFileErrorCode; contextPathToDestination = DISPATCH_DIRECTORY + DISPATCH_PREFIX + errorint + ".jsp"; JahiaConsole.println("JahiaErrorDisplay.DisplayException", "Forwarding error to "+fullPathToDestination); } else { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "Dispatcher not found at "+fullPathToDestination+ " - using standard error"); } } if (jSettings != null) { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "Jahia Settings available, mailing..."); MailException(t, request, response, jSettings, errorint); } else { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "No Jahia Settings, can't mail..."); } JahiaConsole.println("JahiaErrorDisplay.DisplayException", "context is : "+contextPathToDestination); // forwards to the jsp if (jspFile.exists()) { RequestDispatcher dispatcher = context.getRequestDispatcher( contextPathToDestination ); if (dispatcher != null) { request.setAttribute("org.jahia.exception.Message", t.getMessage()); if (IS_STACK_INCLUDED) { String stackTraceStr = stackTraceToString(t); request.setAttribute("org.jahia.exception.StackTrace", stackTraceStr); } dispatcher.forward(request, response); return true; } else { return HTMLFallBackDisplay(request, response, t); } } else { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "JSP file " + fullPathToDestination + " not found, defaulting to built-in message generator"); return HTMLFallBackDisplay(request, response, t); } } catch (ServletException se) { JahiaConsole.println("JahiaErrorDisplay.DisplayException", "JSP caused a Servlet Exception : " + se.getMessage()); JahiaConsole.printe("JahiaErrorDisplay.DisplayException", se);⌨️ 快捷键说明
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